001/*
002 * Copyright 2002-2016 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.messaging.simp.config;
018
019import java.util.Arrays;
020import java.util.Collection;
021import java.util.Collections;
022import java.util.List;
023
024import org.springframework.messaging.MessageChannel;
025import org.springframework.messaging.SubscribableChannel;
026import org.springframework.messaging.simp.broker.AbstractBrokerMessageHandler;
027import org.springframework.util.Assert;
028
029/**
030 * Base class for message broker registration classes.
031 *
032 * @author Rossen Stoyanchev
033 * @since 4.0
034 */
035public abstract class AbstractBrokerRegistration {
036
037        private final SubscribableChannel clientInboundChannel;
038
039        private final MessageChannel clientOutboundChannel;
040
041        private final List<String> destinationPrefixes;
042
043
044        public AbstractBrokerRegistration(SubscribableChannel clientInboundChannel,
045                        MessageChannel clientOutboundChannel, String[] destinationPrefixes) {
046
047                Assert.notNull(clientOutboundChannel, "'clientInboundChannel' must not be null");
048                Assert.notNull(clientOutboundChannel, "'clientOutboundChannel' must not be null");
049
050                this.clientInboundChannel = clientInboundChannel;
051                this.clientOutboundChannel = clientOutboundChannel;
052
053                this.destinationPrefixes = (destinationPrefixes != null ?
054                                Arrays.asList(destinationPrefixes) : Collections.<String>emptyList());
055        }
056
057
058        protected SubscribableChannel getClientInboundChannel() {
059                return this.clientInboundChannel;
060        }
061
062        protected MessageChannel getClientOutboundChannel() {
063                return this.clientOutboundChannel;
064        }
065
066        protected Collection<String> getDestinationPrefixes() {
067                return this.destinationPrefixes;
068        }
069
070
071        protected abstract AbstractBrokerMessageHandler getMessageHandler(SubscribableChannel brokerChannel);
072
073}